Abstract:
We describe 2 new species of leucochloridiid-like brachylaimoid digeneans parasitizing a variety of birds in the Area
de Conservacio´n Guanacaste, Costa Rica, each of which we assign to a new genus. According to Pojmanska’s (Pojmanska, T.
2002a. Superfamily Brachylaimoidea Joyeux & Foley, 1930. In Keys to the Trematoda, D. I. Gibson, A. Jones, and R. A. Bray
[eds.]. CAB International and The Natural History Museum, London, U.K., p. 31–36.) key for the Brachylaimoidea, we are
unable to place either species in any family. One species most closely resembles members of Leucochloridium by having welldeveloped
suckers, lacking an esophagus, and having cecal shoulders, gonads at the posterior end, and the genital pore at posterior
end of body but differs by having symmetrical testes, a posttesticular ovary, and a terminal genital pore; thus, we propose the
genus Bakkeius for it. The second new genus resembles members of Michajlovia by having ventral genital pores but differs by
having extracecal uterine loops in the forebody, a cirrus sac containing the pars prostatica and seminal vesicle, and gland cells
surrounding the genital pore; thus, we propose Pojmanskia for it. These new genera must currently be treated as incertae sedis
according to Pojmanska (op. cit.); however, we feel that future phylogenetic analyses will require emendation of the family
diagnosis for Leucochloridiidae to include those taxa with terminal and ventral genital pores and with preovarian testes.
